Nearly five pounds of what was first believed to have been cocaine concealed in a suitcase flown into Nashville International Airport has been determined by the Metro Nashville Police Crime Laboratory to be the equivalent of one million lethal doses of fentanyl.

Authorities in Nashville were alerted by DEA agents in Phoenix in January that luggage checked by airline passenger Reem Ibrahim was discovered by the TSA to contain a large bundle of what they thought was marijuana along with 2 kilogram-sized packages wrapped in plastic. When Ibrahim landed in Nashville and claimed two checked suitcases, officers stopped her to search her luggage.

Metro Police say one suitcase contained 25 lbs of marijuana and the 2 kilogram-sized packages, which initially tested positive for cocaine. The other suitcase reportedly had another 25 pounds of marijuana packed inside.

Ibrahim, 22, of Phoenix, reportedly told investigators she was promised $1,000 to deliver the luggage to Nashville. She claimed she did not know there were drugs inside the bags. She was arrested on charges of possessing cocaine and marijuana for resale.

Police say the cocaine charge will now be amended to reflect that fentanyl was the substance being transported instead of cocaine.